In a wetland in Hokkaido, Japan, researchers studied how two types of plants, Phragmites australia and Typha latifolia, deal with heavy metals like manganese, iron, zinc, and copper. They found that Typha latifolia is better at absorbing manganese, with leaves containing up to 14 mg/g of dry weight. The plants store iron, zinc, and copper mainly in their roots to protect themselves from taking in too many heavy metals in their above-ground parts. This helps them stay healthy and grow properly.